/*
* CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
* Copyright (C) 2007 Fernando M.A.d.S. <fermads@gmail.com>
* Contributors :
* Michael Hurni <michael.hurni@gmail.com>
* This program is free software; you can redistribute it and/or modify it under the terms of the 
* GNU Lesser General Public License as published by the Free Software Foundation.
* 
* Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
*/
CodePress = {
scrolling : false,
autocomplete : true,
// set initial vars and start sh
initialize : function() {
if(typeof(editor)=='undefined' && !arguments[0]) return;
chars = '|32|46|62|'; // charcodes that trigger syntax highlighting
cc = '\u2009'; // control char
editor = document.getElementsByTagName('body')[0];
document.designMode = 'on';
document.addEventListener('keyup', this.keyHandler, true);
window.addEventListener('scroll', function() { if(!CodePress.scrolling) CodePress.syntaxHighlight('scroll') }, false);
completeChars = this.getCompleteChars();
//CodePress.syntaxHighlight('init');
},
// treat key bindings
keyHandler : function(evt) {
keyCode = evt.keyCode;
charCode = evt.charCode;
if((evt.ctrlKey || evt.metaKey) && evt.shiftKey && charCode!=90)  { // shortcuts = ctrl||appleKey+shift+key!=z(undo) 
CodePress.shortcuts(charCode?charCode:keyCode);
}
else if(completeChars.indexOf('|'+String.fromCharCode(charCode)+'|')!=-1 && CodePress.autocomplete) { // auto complete
CodePress.complete(String.fromCharCode(charCode));
}
else if(chars.indexOf('|'+charCode+'|')!=-1||keyCode==13) { // syntax highlighting
CodePress.syntaxHighlight('generic');
}
else if(keyCode==9 || evt.tabKey) {  // snippets activation (tab)
CodePress.snippets(evt);
}
else if(keyCode==46||keyCode==8) { // save to history when delete or backspace pressed
CodePress.actions.history[CodePress.actions.next()] = editor.innerHTML;
}
else if((charCode==122||charCode==121||charCode==90) && evt.ctrlKey) { // undo and redo
(charCode==121||evt.shiftKey) ? CodePress.actions.redo() :  CodePress.actions.undo(); 
evt.preventDefault();
}
else if(keyCode==86 && evt.ctrlKey)  { // paste
// TODO: pasted text should be parsed and highlighted
}
},
// put cursor back to its original position after every parsing
findString : function() {
var sel = window.getSelection();
var range = window.document.createRange();
var span = window.document.getElementsByTagName('span')[0];
range.selectNode(span);
sel.removeAllRanges();
sel.addRange(range);
span.parentNode.removeChild(span);
//if(self.find(cc))
//window.getSelection().getRangeAt(0).deleteContents();
},
// split big files, highlighting parts of it
split : function(code,flag) {
if(flag=='scroll') {
this.scrolling = true;
return code;
}
else {
this.scrolling = false;
mid = code.indexOf('<SPAN>');
if(mid-2000<0) {ini=0;end=4000;}
else if(mid+2000>code.length) {ini=code.length-4000;end=code.length;}
else {ini=mid-2000;end=mid+2000;}
code = code.substring(ini,end);
return code;
}
},
// syntax highlighting parser
syntaxHighlight : function(flag) {
//if(document.designMode=='off') document.designMode='on'
if(flag!='init') {
var span = document.createElement('span');
window.getSelection().getRangeAt(0).insertNode(span);
}
o = editor.innerHTML;
//o = o.replace(/<br>/g,'\r\n');
//o = o.replace(/<(b|i|s|u|a|em|tt|ins|big|cite|strong)?>/g,'');
//alert(o)
o = o.replace(/<(?!span|\/span|br).*?>/gi,'');
//alert(o)
//x = o;
x = z = this.split(o,flag);
//alert(z)
//x = x.replace(/\r\n/g,'<br>');
x = x.replace(/\t/g, '        ');
if(arguments[1]&&arguments[2]) x = x.replace(arguments[1],arguments[2]);
for(i=0;i<Language.syntax.length;i++) 
x = x.replace(Language.syntax[i].input,Language.syntax[i].output);
editor.innerHTML = this.actions.history[this.actions.next()] = (flag=='scroll') ? x : o.split(z).join(x); 
if(flag!='init') this.findString();
},
getLastWord : function() {
var rangeAndCaret = CodePress.getRangeAndCaret();
words = rangeAndCaret[0].substring(rangeAndCaret[1]-40,rangeAndCaret[1]);
words = words.replace(/[\s\n\r\);\W]/g,'\n').split('\n');
return words[words.length-1].replace(/[\W]/gi,'').toLowerCase();
}, 
snippets : function(evt) {
var snippets = Language.snippets;
var trigger = this.getLastWord();
for (var i=0; i<snippets.length; i++) {
if(snippets[i].input == trigger) {
var content = snippets[i].output.replace(/</g,'&lt;');
content = content.replace(/>/g,'&gt;');
if(content.indexOf('$0')<0) content += cc;
else content = content.replace(/\$0/,cc);
content = content.replace(/\n/g,'<br>');
var pattern = new RegExp(trigger+cc,'gi');
evt.preventDefault(); // prevent the tab key from being added
this.syntaxHighlight('snippets',pattern,content);
}
}
},
readOnly : function() {
document.designMode = (arguments[0]) ? 'off' : 'on';
},
complete : function(trigger) {
window.getSelection().getRangeAt(0).deleteContents();
var complete = Language.complete;
for (var i=0; i<complete.length; i++) {
if(complete[i].input == trigger) {
var pattern = new RegExp('\\'+trigger+cc);
var content = complete[i].output.replace(/\$0/g,cc);
parent.setTimeout(function () { CodePress.syntaxHighlight('complete',pattern,content)},0); // wait for char to appear on screen
}
}
},
getCompleteChars : function() {
var cChars = '';
for(var i=0;i<Language.complete.length;i++)
cChars += '|'+Language.complete[i].input;
return cChars+'|';
},
shortcuts : function() {
var cCode = arguments[0];
if(cCode==13) cCode = '[enter]';
else if(cCode==32) cCode = '[space]';
else cCode = '['+String.fromCharCode(charCode).toLowerCase()+']';
for(var i=0;i<Language.shortcuts.length;i++)
if(Language.shortcuts[i].input == cCode)
this.insertCode(Language.shortcuts[i].output,false);
},
getRangeAndCaret : function() {
var range = window.getSelection().getRangeAt(0);
var range2 = range.cloneRange();
var node = range.endContainer;
var caret = range.endOffset;
range2.selectNode(node);
return [range2.toString(),caret];
},
insertCode : function(code,replaceCursorBefore) {
var range = window.getSelection().getRangeAt(0);
var node = window.document.createTextNode(code);
var selct = window.getSelection();
var range2 = range.cloneRange();
// Insert text at cursor position
selct.removeAllRanges();
range.deleteContents();
range.insertNode(node);
// Move the cursor to the end of text
range2.selectNode(node);
range2.collapse(replaceCursorBefore);
selct.removeAllRanges();
selct.addRange(range2);
},
// get code from editor
getCode : function() {
var code = editor.innerHTML;
code = code.replace(/<br>/g,'\n');
code = code.replace(/\u2009/g,'');
code = code.replace(/<.*?>/g,'');
code = code.replace(/&lt;/g,'<');
code = code.replace(/&gt;/g,'>');
code = code.replace(/&amp;/gi,'&');
return code;
},
// put code inside editor
setCode : function() {
var code = arguments[0];
code = code.replace(/\u2009/gi,'');
code = code.replace(/&/gi,'&amp;');
code = code.replace(/</g,'&lt;');
code = code.replace(/>/g,'&gt;');
editor.innerHTML = code;
},
// undo and redo methods
actions : {
pos : -1, // actual history position
history : [], // history vector
undo : function() {
if(editor.innerHTML.indexOf(cc)==-1){
window.getSelection().getRangeAt(0).insertNode(document.createTextNode(cc));
this.history[this.pos] = editor.innerHTML;
}
this.pos--;
if(typeof(this.history[this.pos])=='undefined') this.pos++;
editor.innerHTML = this.history[this.pos];
CodePress.findString();
},
redo : function() {
this.pos++;
if(typeof(this.history[this.pos])=='undefined') this.pos--;
editor.innerHTML = this.history[this.pos];
CodePress.findString();
},
next : function() { // get next vector position and clean old ones
if(this.pos>20) this.history[this.pos-21] = undefined;
return ++this.pos;
}
}
}
Language={};
window.addEventListener('load', function() { CodePress.initialize('new'); }, true);